Dopamine is a neurotransmitter found in the brain at the center of the pleasure and reward system. When your brain associates an activity with pleasure — a rejuvenating bout of yoga or eating a sweet treat — it produces dopamine. In the future, even thinking about this activity can cause the brain to release the hormone. Balanced dopamine is also involved in a variety of other bodily processes, including digestion, heart function, memory, sleep, and stress response. It also helps support the skin barrier and improve skin circulation, which can contribute to a dewy glow.